Gear wheel



E. L. AIKEN.

GE'AR WHEEL.

APPLICATION FILED mm. H, 1921.

Patented Sept. 5, 1922.

.lines reamed Sept. 5, 1922.

' um'rao STATES PATENT OFFICE.

EDW Ii. AIKEN, OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO SPLI'I'DORIF ELECTRICAL COMPANY, OF NEWARK, NEW JERSEY.

GEAR WHEEL.

Application filed March 11, 1921. Serial No. 451,538.

To all whom it may concern:

Be it known that I, EDWARD L. AIKEN, a citizen of the United States, residing at East Orange, in the county of Essex, State of New Jersey, have invented certain new and useful Improvements in Gear Wheels, of which the following is a description, reference be ing had to the accompanying drawing and to the figures of reference marked thereon. This invention relates to gear wheels. The main object of this invention is to produce a gear wheel which shall be practically noiseless in operation.

Another object of the invention is tomake a gear wheel which shall be easy and cheap to manufacture.

Other and further objects will appear after reading the accompanying specification and claims in connection with the accompanying drawings in which:

Figure 1 is a plan view of a gear wheel constructed in accordance withmy invention, hidden parts being shown in dotted Figure 2 is a section through the gear taken along the line 2-2 of Fig. 1;

Figure 3 is a plan view of the hub of the gear wheel; and

Figure 4 is a fragmentary portionof a modified form of the ring of my gear wheel.

According to my invention a metallic ring 1 havin an internal flange 2 is punched, die cast or ot erwise formed, the flange being provided with circular openings 3. The ring is T-shaped in cross section as is clearly shown in the lower art of Fig. 2. A metallic hub 4 is provide Said hub comprising a sleeve 5 and a flange 6, the flange being provided at intervals with projections 7 preferably of inverted conical form and preferably in the form of pins driven into the flange and riveted thereto, as shown in Figs. 3 and 2. The hub and ring are placed in a mold and a non-metallic binder 8, preferably in the form of a phenolic condensation product such as bakelite is molded about the fla e of the ring and into the openings 3 and bin s the hub and ring together. The outercircumferen'ce of the ring is then milled, as is noiseles gear wheels made of aminated or wholly moulded material or to gears the teeth of which are made of composite metallic and non-metallic material. It is well known that metallic gear wheels are noisy in operation due to the vibrations thereof while in operation and due to the large area of the gear wheel which may vibrate. The binder 8 and the absence of a large metallic surface insures a deadening of any sonorous vibrations to which the gear wheel may be subjected and insures quiet operation thereof.

Having I claim is:

1. A gear wheel havin a metallic inter nally flanged, toothed IlIIl with openings therein, a metallic hub having an outwardly extending flange and a non-metallic filler moulded about said rim flange and in the openings thereof, and also about a portion of the hub and the outer periphery of its flange, and further means on the hub flange thus described my invention, what adapted to be gripped by the moulding marigid projections carried thereby, and a disc of non-metallic material of substantially the same width as the rim and having the flange of the rim and the projections of the hub flange embedded therein.

In testimony whereof, I aifix my slgnature.

EDWARD L. AIKEN. 

